WO2014083701A1 - 鋼板加工方法、および鋼板加工装置 - Google Patents

鋼板加工方法、および鋼板加工装置 Download PDF

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Publication number
WO2014083701A1
WO2014083701A1 PCT/JP2012/081177 JP2012081177W WO2014083701A1 WO 2014083701 A1 WO2014083701 A1 WO 2014083701A1 JP 2012081177 W JP2012081177 W JP 2012081177W WO 2014083701 A1 WO2014083701 A1 WO 2014083701A1
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WO
WIPO (PCT)
Prior art keywords
steel plate
bead
die
steel sheet
cutting
Prior art date
Application number
PCT/JP2012/081177
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
和美 齊藤
Original Assignee
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to PCT/JP2012/081177 priority Critical patent/WO2014083701A1/ja
Priority to EP12889356.7A priority patent/EP2929952B1/en
Priority to US14/646,862 priority patent/US9687900B2/en
Priority to CN201280077414.3A priority patent/CN104884183B/zh
Priority to JP2014549745A priority patent/JP5920485B2/ja
Publication of WO2014083701A1 publication Critical patent/WO2014083701A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/001—Shaping combined with punching, e.g. stamping and perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D27/00—Machines or devices for cutting by a nibbling action

Definitions

  • the present invention relates to a steel plate processing method and a steel plate processing apparatus for processing a steel plate into a predetermined shape.
  • Patent Document 1 discloses a mold pair for performing trimming on a steel plate that has been subjected to drawing, a mold pair for performing rough bending on a steel plate that has been subjected to trimming, and rough bending.
  • a press machine in which a pair of dies for performing a finish bending process on a steel sheet to which is applied. According to the press, it is possible to simultaneously process a plurality (three) of steel plates in different states.
  • Patent Document 2 a steel plate is drawn by a press device provided with an upper die and a lower die, and the drawn steel plate is trimmed by a laser cutter attached to a robot arm.
  • a technique is disclosed in which a steel sheet that has been subjected to trimming is bent by a roller attached to a robot arm.
  • Patent Document 2 is disadvantageous in that the cost required for processing the steel sheet increases when the steel sheet is trimmed using a laser cutter.
  • This invention makes it a subject to provide the technique which can process a steel plate cheaply.
  • the steel plate processing method is a steel plate processing method for processing a steel plate into a predetermined shape, and a drawing process for drawing the steel sheet using at least a pair of molds, and the drawing process.
  • a cutting step of cutting the steel sheet that has been drawn in the process using at least one nibler, and the nibler is housed in a cylindrical case and the case
  • Scan and the steel sheet fed between the die characterized by cutting by punching continuously by said punch.
  • a bead protruding toward one surface side of the steel plate is formed annularly over the entire circumference of the peripheral edge of the steel plate, and at least a part of the bead Is formed with a lower portion having a height smaller than the shortest distance between the case and the die in the nibler, and in the cutting step, beyond the lower portion from the periphery of the steel plate, than the bead. It is preferable to move the nibbler to an inner portion and cut out a portion including the bead in the peripheral edge of the steel plate.
  • the lower part of the bead is preferably formed so as to be flush with the surface of the steel plate.
  • a bead protruding on one surface side of the steel plate is formed over the entire circumference of the peripheral edge of the steel plate, and the bead is at least at one place.
  • One and the other of the divided parts in the bead are arranged at intervals along the inner and outer directions of the steel sheet so as to form a gap that allows the nibbler to pass through, and the cutting step.
  • the nibbler is moved through the gap to a portion inside the bead in the steel plate, and a portion including the bead is cut out in a peripheral portion of the steel plate.
  • a bead protruding toward one surface side of the steel plate is formed in a continuous ring over the entire circumference of the peripheral edge of the steel plate, and the cutting process is performed.
  • it is preferable that cutting is performed from a peripheral edge of the steel plate to a portion inside the bead, and the nibler is made to enter the cutting portion to cut off a portion including the bead in the peripheral portion of the steel plate.
  • a bead protruding toward one surface side of the steel plate is formed in a continuous ring over the entire circumference of the peripheral edge of the steel plate, and the cutting process is performed.
  • at least a part of the bead is pressed so as to have a height smaller than the shortest distance between the case and the die in the nibler, beyond the pressed part of the bead from the periphery of the steel plate, It is preferable to move the nibbler to a portion inside the bead and cut out a portion including the bead in the peripheral portion of the steel plate.
  • a bead protruding toward one surface side of the steel plate is formed in a continuous ring over the entire circumference of the peripheral edge of the steel plate, and the steel plate In the portion inside the bead, a slit penetrating the surface of the steel plate is provided, thereby forming a slit processed portion that can be bent to one surface side of the steel plate.
  • the slit processing A through hole into which the nibler can be inserted is formed in the steel plate by bending a portion to one surface side of the steel plate, the nibler is inserted into the through hole, and the bead at the peripheral portion of the steel plate is It is preferable to cut off the part to include.
  • the method further includes a bending step of bending the steel plate that has been cut in the cutting step.
  • a steel plate processing apparatus is a steel plate processing apparatus for processing a steel plate into a predetermined shape, and has at least a pair of molds and performs drawing processing on the steel plate, and at least one drawing processing device.
  • a cutting apparatus that has a nibler and performs cutting on the steel sheet that has been drawn by the drawing apparatus, and performs bending on the steel sheet that has been cut by the cutting apparatus.
  • the nibbler is a cylindrical case, a punch that is housed in the case and punches the steel sheet by reciprocating vertically, and a die hole into which the punch enters, And a discharge hole for discharging scrap punched from the steel plate is formed in communication with the die hole, and is provided below the case so as to sandwich the steel plate with the case.
  • Comprising a die is, the, the steel sheet supplied to between said casing die, characterized by cutting by punching continuously by the punch while moving.
  • the steel sheet can be processed at low cost.
  • the figure which shows the steel plate processing apparatus which concerns on 1st embodiment of this invention The figure which shows the drawing apparatus of a steel plate processing apparatus.
  • the bottom view which shows the convex part formed in the upper mold
  • the top view which shows the recessed part formed in the lower mold
  • the top view which shows the recessed part formed in the lower mold
  • the steel plate processing apparatus 1 is an apparatus for processing a workpiece W that is a steel plate into a predetermined shape.
  • the vertical direction in FIG. 1 is defined as the vertical direction of the steel sheet processing apparatus 1.
  • the steel sheet processing apparatus 1 includes a drawing apparatus 2, a cutting apparatus 3, and a bending apparatus 4.
  • the drawing apparatus 2 includes a press machine 21, an upper mold 22, and a lower mold 23.
  • the drawing apparatus 2 is configured to perform drawing on the workpiece W.
  • An upper die 22 and a lower die 23 are attached to the press machine 21, and the upper die 22 is configured to be close to and away from the lower die 23.
  • the upper mold 22 and the lower mold 23 are a pair of molds attached to the press machine 21, and are arranged on the upper and lower parts of the press machine 21, respectively.
  • the upper mold 22 and the lower mold 23 are configured to perform drawing processing on the workpiece W disposed between the upper mold 22 and the lower mold 23 when the upper mold 22 is brought close to the lower mold 23 by the press machine 21.
  • the upper die 22 has a die hole 221 and a die portion 222.
  • the die hole 221 is formed so that the lower surface of the upper die 22 is recessed upward.
  • the die hole 221 is formed along the shape of a punch portion 231 of the lower mold 23 described later.
  • the die portion 222 is configured to perform drawing processing on the workpiece W together with the punch portion 231 of the lower mold 23.
  • the die part 222 is formed so as to surround the die hole 221. That is, the die portion 222 corresponds to a portion of the upper mold 22 where the die hole 221 is not formed.
  • On the lower surface of the die portion 222 a wrinkle pressing surface for restraining the peripheral portion of the workpiece W is formed.
  • a plurality of convex portions 222a, 222a,... For suppressing inflow of the workpiece W (movement toward the die hole 221) when the workpiece W is drawn is projected downward on the wrinkle holding surface of the die portion 222. It is formed as follows.
  • Each convex part 222a is formed in a substantially trapezoidal shape in a sectional view.
  • the plurality of convex portions 222 a, 222 a... are formed so as to surround the die hole 221 along the shape of the die hole 221 on the wrinkle holding surface of the die portion 222, and adjacent convex portions 222 a.
  • -222a is arrange
  • the plurality of protrusions 222a, 222a,... Is a single protrusion formed continuously so as to return from the predetermined position on the wrinkle holding surface of the die part 222 to the position around the die hole 221. It is formed in a shape in which a plurality of parts in the part are removed.
  • the die hole 221 is formed in a substantially rectangular shape in a bottom view, and the six convex portions 222a, 222a,... Surround the die hole 221 in a substantially rectangular shape in a bottom view. Is formed.
  • the press machine 21 to which a pair of molds (upper mold 22 and lower mold 23) are attached is used, but a multistage press machine in which a plurality of pairs of molds are attached in the vertical direction is used. It is also possible to use it.
  • the lower mold 23 has a punch portion 231 and a blank holder 232.
  • the punch part 231 is formed so as to protrude toward the die hole 221 of the upper die 22.
  • the punch portion 231 is formed along the shape of the die hole 221 of the upper die 22.
  • the punch portion 231 is configured to perform drawing processing on the workpiece W together with the die portion 222 of the upper die 22.
  • the blank holder 232 is configured to sandwich and restrain the peripheral portion of the workpiece W together with the die portion 222 of the upper mold 22.
  • the blank holder 232 is provided so as to surround the punch portion 231. That is, the blank holder 232 is formed with a through-hole through which the punch portion 231 passes so as not to contact the punch portion 231 (see FIG. 4).
  • the blank holder 232 is urged upward by a predetermined urging means via a plurality of cushion pins 233, 233, etc., and downward when a load against the urging force is applied. Move to.
  • the blank holder 232 is configured such that, when no load is applied, the upper surface of the blank holder 232 is the same as the upper surface of the punch portion 231 or higher than the upper surface of the punch portion 231.
  • the cushion pin 233 is a bar material extending in the vertical direction. The upper end portion of the cushion pin 233 is fixed to the blank holder 232, and the lower end portion of the cushion pin 233 is fixed to the urging means.
  • the upper surface of the blank holder 232 corresponds to the wrinkle pressing surface of the die part 222.
  • a plurality of recesses 232a, 232a,... Corresponding to the plurality of projections 222a, 222a,.
  • Each concave portion 232a is formed along the shape of the corresponding convex portion 222a. That is, each recess 232a is formed in a substantially trapezoidal shape in a sectional view.
  • the plurality of recesses 232a, 232a,... are formed in accordance with the positions of the plurality of protrusions 222a, 222a,. Specifically, the plurality of recesses 232a, 232a,... Are formed on the upper surface of the blank holder 232 so as to surround the through hole along the shape of the through hole of the blank holder 232, and adjacent recesses 232a, 232a are Are arranged at a predetermined interval. That is, the recess 232a is intermittently provided so as to surround the through hole. In other words, the plurality of recesses 232a, 232a,...
  • the through-holes of the punch portion 231 and the blank holder 232 are formed in a substantially rectangular shape, and the six recesses 232a, 232a,. It is formed in a substantially rectangular shape.
  • the cutting device 3 includes a lower mold 31, robots 32 and 32, and nibblers 33 and 33.
  • the cutting apparatus 3 is an apparatus for performing a cutting process on the workpiece W that has been subjected to the drawing process by the drawing apparatus 2.
  • the lower mold 31 is a member on which the workpiece W that has been drawn by the drawing device 2 is placed.
  • the robot 32 has an articulated arm, and is configured to be able to change the position and posture of the arm.
  • a nibler 33 for removing (trimming) unnecessary portions at the peripheral edge of the workpiece W placed on the lower mold 31 is attached to the tip of the arm of the robot 32.
  • the number of the robots 32 is not limited, and it is sufficient that at least one robot 32 to which the nibbler 33 is attached is provided. When two or more robots 32 are provided, the nibbler 33 may be attached to at least one robot 32.
  • the nibler 33 is a device that continuously punches the workpiece W while moving, and includes a case 331, a punch 332, a support portion 333, and a die 334. And a driving unit 335.
  • the vertical direction in FIG. 5A is defined as the vertical direction of the nibler 33.
  • the case 331 is formed in a substantially cylindrical shape extending in the vertical direction, and its lower end is opened.
  • a punch 332 is accommodated in the case 331 so as to be slidable in the vertical direction.
  • a support portion 333 for supporting the case 331 and the die 334 is fixed to the inner peripheral surface of the case 331.
  • the punch 332 is configured to reciprocate in the vertical direction and punch the workpiece W.
  • the punch 332 includes a punch blade 332a and a connecting portion 332b.
  • the punch blade 332a has a substantially hoof-shaped cross-sectional shape, and a blade tip for punching the workpiece W is formed at the lower end.
  • the connecting portion 332b is connected to the driving portion 335 so that the punch 332 reciprocates in the vertical direction by the driving portion 335.
  • the support portion 333 is a member for supporting the case 331 and the die 334.
  • the upper end portion of the support portion 333 is fixed to the inner peripheral surface of the case 331 and extends downward from the inside of the case 331.
  • the support portion 333 has a shape such that an opening along the cross-sectional shape of the punch blade 332 a is formed on the lower end surface of the case 331. That is, a space for storing the punch 332 is formed between the portion of the support portion 333 inserted into the case 331 and the case 331, and is formed on the lower end surface of the case 331 in the space.
  • the opening has a shape along the cross-sectional shape of the punch blade 332a.
  • a die 334 is fixed to the lower end portion of the support portion 333.
  • the die 334 is provided below the case 331 so as to sandwich the workpiece W with the case 331.
  • the die 334 has a substantially cylindrical shape, and is fixed to the support portion 333 so as to cover the lower end portion of the support portion 333.
  • the die 334 has a die hole 334a and a discharge hole 334b.
  • the die hole 334a is formed so that the punch blade 332a enters when the punch 332 reaches the bottom dead center.
  • the die hole 334a is formed between the die 334 and a portion of the support portion 333 that is inserted into the die 334, and has a shape that follows the cross-sectional shape of the punch blade 332a. Open to the end face.
  • the discharge hole 334 b is a hole for discharging the crescent-shaped scrap S punched out from the workpiece W by the punch 332 to the outside of the die 334.
  • the discharge hole 334b is formed on the side surface of the die 334 and communicates with the die hole 334a.
  • the drive unit 335 is configured to reciprocate the punch 332 in the vertical direction.
  • the drive unit 335 includes a connecting unit 335a, a rod 335b, and a motor 335c.
  • the connecting portion 335 a is connected to the connecting portion 332 b of the punch 332.
  • the rod 335b is connected to the motor 335c and the connecting portion 335a so as to transmit the power of the motor 335c to the connecting portion 335a.
  • the motor 335c is configured to transmit power to the connecting portion 335a via the rod 335b.
  • the rotational motion of the motor 335c is converted into the vertical motion of the connecting portion 335a via the rod 335b.
  • the nibler 33 moves in a predetermined direction with the workpiece W interposed between the case 331 and the die 334, and moves the punch 332 in the vertical direction (approaching and separating from the die 334).
  • the workpiece W can be punched continuously by reciprocating in the direction).
  • the nibler 33 by using the nibler 33, the workpiece W can be trimmed at a lower cost than when a laser cutter is used. Further, when the work W is trimmed using the end mill, the end mill is worn in a short time, and the cost required for trimming the work W is deteriorated. However, when the nibler 33 is used, the punch 332 is relatively hard to wear and is inexpensive, so the cost required for trimming the workpiece W can be suppressed.
  • the die 334 is configured such that the scrap S is discharged from the discharge hole 334b through the die hole 334a. That is, the scrap S is discharged below the workpiece W. Therefore, it is possible to prevent the scrap S from adhering to the workpiece W, and the workpiece W can be satisfactorily cut.
  • the bending apparatus 4 includes a lower mold 41, robots 42 and 42, and bending rollers 43 and 43.
  • the bending apparatus 4 is an apparatus for bending the workpiece W that has been cut by the cutting apparatus 3.
  • the lower die 41 is a member on which the workpiece W cut by the cutting device 3 is placed.
  • the robot 42 is configured in substantially the same manner as the robot 32.
  • a bending roller 43 for bending the workpiece W placed on the lower mold 41 is attached to the tip of the arm of the robot 42.
  • the number of the robots 42 is not limited, and it is sufficient that at least one robot 42 to which the bending roller 43 is attached is provided. Further, when two or more robots 42 are provided, the bending roller 43 may be attached to at least one robot 42.
  • the bending roller 43 performs bending on the workpiece W by rolling while pressing a predetermined portion of the workpiece W placed on the lower mold 41.
  • the shape of the bending roller 43 is not limited, and may be a shape corresponding to the processed portion of the workpiece W. It is also possible to provide a plurality of rollers having different uses for one robot 42.
  • the steel plate processing step S1 includes a drawing step S2, a cutting step S3, and a bending step S4.
  • the drawing process S ⁇ b> 2 is a process for drawing the workpiece W using the drawing apparatus 2.
  • the drawing step S ⁇ b> 2 first, the workpiece W is arranged between the upper die 22 and the lower die 23, and the peripheral portion of the workpiece W is the die portion 222 of the upper die 22 and the lower die.
  • the upper die 22 is lowered toward the lower die 23 so as to be pressed by the 23 blank holders 232. And, by lowering the upper die 22 to the bottom dead center against the urging force of the urging means for urging the blank holder 232 upward via the plurality of cushion pins 233, 233.
  • W is formed in a shape along the punch portion 231 of the lower mold 23.
  • the peripheral portion of the workpiece W is restrained by the die portion 222 and the blank holder 232, and the workpiece W is drawn by the punch portion 231.
  • the dice portion 222 and the blank holder 232 are formed with a plurality of convex portions 222a, 222a,... And a plurality of concave portions 232a, 232a, respectively (see FIGS. 3 and 4). Therefore, when the peripheral part of the workpiece W is pressed by the die part 222 and the blank holder 232, a plurality of convex parts 222 a, 222 a... And a plurality of concave parts 232 a, 232 a.
  • a plurality of beads Wb, Wb... Are formed so as to protrude downward along the shape. In this way, the plurality of convex portions 222a, 222a,... And the plurality of concave portions 232a, 232a,.
  • a plurality of beads Wb, Wb... are orthogonal to the inflow direction of the workpiece W in order to suppress the inflow of the workpiece W when the workpiece W is drawn by the upper die 22 and the lower die 23. Formed along.
  • the plurality of beads Wb, Wb... Are formed so as to protrude downward so as to have a substantially trapezoidal shape in a sectional view.
  • the plurality of beads Wb, Wb... are formed over the entire circumference of the peripheral edge of the workpiece W, and the adjacent beads Wb, Wb are arranged at a predetermined interval. . That is, the beads Wb are intermittently formed over the entire periphery of the peripheral portion of the workpiece W.
  • the plurality of beads Wb, Wb... are a plurality of beads in one bead continuously formed so as to return from the predetermined position in the peripheral portion of the work W to the position around the entire periphery of the peripheral portion.
  • the shape is formed by removing the portion.
  • the workpiece W is formed in a substantially rectangular shape in plan view, and the six beads Wb, Wb... Are substantially rectangular in plan view over the entire circumference of the peripheral edge of the workpiece W. It is formed into a shape.
  • the cutting process S3 is a process of cutting the workpiece W that has undergone the drawing process S2 by using the cutting apparatus 3.
  • the workpiece W is continuously punched out while moving the nibler 33 of the cutting device 3 from an arbitrary position on the periphery of the workpiece W that has undergone the drawing step S2, so Cut out unnecessary parts (trimming).
  • work W contains the part in which several bead Wb * Wb ... was formed. Therefore, when the unnecessary part in the peripheral part of the workpiece
  • FIG. When trying to cut the workpiece W beyond the bead Wb by the nibler 33, the case 331 and the die 334 interfere with the bead Wb due to the configuration of the nibler 33, so that the plurality of beads Wb, Wb. It is difficult to move the nibbler 33 to the inner part.
  • a plurality of beads Wb, Wb... are formed at predetermined intervals. That is, a gap is formed between adjacent beads Wb and Wb. Therefore, as shown in FIG. 9, the nibler 33 can be moved to a portion inside the plurality of beads Wb, Wb... Thus, after moving the nibler 33 through the gap between the beads Wb and Wb to a portion inside the plurality of beads Wb, Wb... In the workpiece W, the nibler 33 is moved over the entire circumference of the peripheral portion of the workpiece W. Thereby, an unnecessary part in the peripheral part of the workpiece W can be cut off. In addition, the space
  • each portion including one bead Wb When trimming the workpiece W, it is preferable to cut out each portion including one bead Wb. As shown in FIG. 10, in the present embodiment, since six beads Wb, Wb... Are formed on the workpiece W, an unnecessary portion in the peripheral portion of the workpiece W can be cut into six parts. That's fine. Thereby, the unnecessary part cut out can be made small and a discard process can be performed easily. Note that the arrows in FIG. 10 indicate the movement path of the nibbler 33.
  • the unnecessary portions including one bead Wb may be cut out two by two at the same time by the nibblers 33 and 33. Thereby, trimming of the workpiece
  • work W can be performed in a short time.
  • the workpiece W is formed in a substantially rectangular shape in plan view, and the six beads Wb, Wb... Are substantially rectangular in plan view over the entire circumference of the peripheral edge of the workpiece W.
  • the shapes of the workpiece W and the beads Wb and the number of the beads Wb are not limited.
  • the “peripheral portion” of the workpiece according to the present invention includes an outer peripheral portion and an inner peripheral portion of the work. For example, when a predetermined through-hole is formed in the work, beads are formed not only on the outer peripheral edge of the work but also around the through-hole, that is, on the inner peripheral edge of the work.
  • the bead is intermittently formed over the entire circumference of the peripheral portion of the work so that at least a part thereof does not exist, but at least a part of the bead is You just need to set it high enough to move beyond the bead.
  • one bead Wb is continuously formed, and a part of the bead Wb has such a height that it can move beyond the bead Wb, and the height is lower than the other parts. What is necessary is just to form low part Wba used as a part.
  • the low portion Wba has a vertical dimension (high) that is smaller than the shortest distance between the case 331 and the die 334 (strictly speaking, the distance between the lower end surface of the case 331 and the upper end surface of the die 334 (see FIG. 5)). A). That is, the low part Wba is configured to be punched by the punch 332 of the nibler 33 so that the nibler 33 can pass over the low part Wba.
  • the nibler 33 may be moved to a portion inside the plurality of beads Wb, Wb...
  • the gap between the beads Wb and Wb corresponds to the low portion Wba.
  • the low portion Wba is formed so as to be flush with the surface of the workpiece W.
  • the bead continuously formed over the entire periphery of the peripheral portion of the workpiece is divided at at least one place, and one and the other of the divided portions are arranged at intervals in the inner and outer directions of the workpiece.
  • a path for moving the nibbler to a portion inside the bead in the workpiece may be formed.
  • one bead Wb is continuously formed over the entire circumference of the peripheral edge of the workpiece W such that one end and the other end of the bead Wb are separated in the inner and outer directions of the workpiece W.
  • the distance between one end and the other end of the bead Wb is set to such an extent that the nibler 33 can pass through. As shown in FIG.
  • the “inside / outside direction” of the workpiece W is a direction from the outer edge of the workpiece W to the inside of the bead Wb, and a direction orthogonal to the circumferential direction of the peripheral edge of the workpiece W along the surface of the workpiece W. is there.
  • the arrows in FIG. 12 indicate the movement path of the nibbler 33.
  • the bead formed continuously over the entire circumference of the peripheral edge of the work is shifted inward and outward, so that the nibler can be moved to the inner part of the work without increasing the inflow amount of the work.
  • a path for movement can be formed.
  • the bead since the bead has a shape separated so as to be separated along the inflow direction of the work, rather than a shape separated so as to be separated along the circumferential direction in the peripheral portion of the work, the work flows in. The resistance when doing so does not decrease.
  • the bending process S4 is a process of bending the workpiece W that has undergone the cutting process S3 by using the bending apparatus 4.
  • the workpiece W is bent by rolling the bending roller 43 while pressing a predetermined portion of the workpiece W that has undergone the cutting step S3 by the bending roller 43 of the bending device 4. Apply.
  • the workpiece W is processed into a predetermined shape by sequentially performing the drawing step S2, the cutting step S3, and the bending step S4.
  • the steel plate processing apparatus 1001 is an apparatus for processing a workpiece W that is a steel plate into a predetermined shape.
  • the vertical direction in FIG. 14 is defined as the vertical direction of the steel sheet processing apparatus 1001.
  • symbol is attached
  • the steel sheet processing apparatus 1001 includes a drawing apparatus 1002, a cutting apparatus 1003, and a bending apparatus 4.
  • the drawing apparatus 1002 includes a press machine 21, an upper mold 1022, and a lower mold 1023.
  • the drawing apparatus 1002 is configured to perform drawing on the workpiece W.
  • an upper die 1022 and a lower die 1023 are attached to the press machine 21.
  • the upper mold 1022 and the lower mold 1023 are a pair of molds attached to the press machine 21, and are arranged on the upper part and the lower part of the press machine 21, respectively.
  • the upper mold 1022 and the lower mold 1023 are configured to perform drawing processing on the workpiece W disposed between the upper mold 1022 and the lower mold 1023 when the upper mold 1022 is brought close to the lower mold 1023 by the press machine 21.
  • the upper mold 1022 has a die hole 1221 and a die part 1222.
  • the die hole 1221 is formed so that the lower surface of the upper mold 1022 is recessed upward.
  • the die hole 1221 is formed along the shape of a punch portion 1231 of the lower mold 1023 described later.
  • the die part 1222 and the punch part 1231 of the lower mold 1023 are configured so as to perform drawing processing on the workpiece W.
  • the die part 1222 is formed so as to surround the die hole 1221. That is, the die portion 1222 corresponds to a portion of the upper mold 1022 where the die hole 1221 is not formed.
  • a wrinkle pressing surface for restraining the peripheral portion of the workpiece W is formed.
  • the wrinkle holding surface of the die part 1222 is formed with a convex part 1222a for suppressing the inflow of the work W (movement toward the die hole 1221) when the work W is drawn.
  • the convex portion 1222a is formed so as to protrude downward so as to have a substantially trapezoidal shape in a sectional view.
  • the protrusion 1222a is continuously formed so as to surround the die hole 1221 along the shape of the die hole 1221.
  • the convex portion 1222a is formed in an annular shape so as to return from the predetermined position on the wrinkle holding surface of the die portion 1222 around the die hole 1221 to the position.
  • the die hole 1221 is formed in a substantially rectangular shape in bottom view
  • the convex portion 1222a is formed in a substantially rectangular shape in bottom view so as to surround the die hole 1221.
  • the lower mold 1023 has a punch portion 1231 and a blank holder 1232.
  • the punch part 1231 is formed so as to protrude toward the die hole 1221 of the upper mold 1022.
  • the punch portion 1231 is formed along the shape of the die hole 1221 of the upper mold 1022.
  • the punch portion 1231 is configured to perform drawing processing on the workpiece W together with the die portion 1222 of the upper mold 1022.
  • the blank holder 1232 is configured to sandwich and restrain the peripheral portion of the workpiece W together with the die portion 1222 of the upper mold 1022.
  • the blank holder 1232 is provided so as to surround the punch portion 1231. That is, the blank holder 1232 is formed with a through-hole through which the punch portion 1231 passes so as not to contact the punch portion 1231 along the shape of the punch portion 1231.
  • the blank holder 1232 is urged upward by a predetermined urging means via a plurality of cushion pins (not shown), and moves downward when a load against the urging force is applied. To do.
  • the blank holder 1232 is configured such that, when no load is applied, the upper surface thereof is the same as the upper surface of the punch portion 1231 or higher than the upper surface of the punch portion 1231.
  • the upper surface of the blank holder 1232 corresponds to the wrinkle pressing surface of the die portion 1222.
  • a concave portion 1232 a corresponding to 1222 a of the die portion 1222 in the upper mold 1022 is formed on the upper surface of the blank holder 1232 so as to be recessed downward.
  • the concave portion 1232a is formed along the shape of the convex portion 1222a. That is, the recessed part 1232a is formed in a substantially trapezoidal shape in a sectional view.
  • the recess 1232a is continuously formed along the shape of the through hole of the blank holder 1232 so as to surround the through hole.
  • the recess 1232 a is formed in an annular shape so as to return from the predetermined position on the upper surface of the blank holder 1232 to the position around the through hole.
  • the through holes of the punch portion 1231 and the blank holder 1232 are formed in a substantially rectangular shape
  • the concave portion 1232a is formed in a substantially rectangular shape in plan view so as to surround the through hole. Yes.
  • the cutting device 1003 includes a lower mold 31, robots 32 and 32, a nibler 33, and an end mill 1034.
  • the cutting device 1003 is a device for cutting the workpiece W that has been drawn by the drawing device 1002.
  • a nibbler 33 is attached to one robot 32, and an end mill 1034 is attached to the other robot 32.
  • the end mill 1034 is configured to perform cutting on the workpiece W.
  • the steel plate processing step S1001 includes a drawing step S1002, a cutting step S1003, and a bending step S1004.
  • the drawing step S1002 is a step of drawing the workpiece W using the drawing device 1002.
  • the operation mode when the drawing apparatus 1002 performs drawing of the workpiece W is substantially the same as that of the drawing apparatus 2 of the steel plate processing apparatus 1, and thus detailed description thereof is omitted.
  • the die portion 1222 and the blank holder 1232 are formed with a convex portion 1222a and a concave portion 1232a, respectively (see FIGS. 15 and 16). Therefore, when the peripheral part of the workpiece W is pressed by the die part 1222 and the blank holder 1232, the bead Wb protrudes downward along the shape of the convex part 1222 a and the concave part 1232 a on the peripheral part of the work W. Formed.
  • the convex part 1222a and the concave part 1232a function as a bead forming part.
  • the bead Wb is continuously formed over the entire periphery of the peripheral portion of the workpiece W.
  • the bead Wb is formed in an annular shape so as to return from a predetermined position at the peripheral edge of the work W to the position around the entire periphery.
  • Cutting process step S1003 is a process of cutting the workpiece W that has undergone the drawing process S1002 by using the cutting apparatus 1003.
  • the bead Wb is formed in an annular shape that is continuous over the entire circumference of the peripheral edge of the workpiece W. Therefore, unlike the workpiece W that has undergone the drawing step S2 of the steel plate machining step S1, the workpiece W that has undergone the drawing step S1002 has a path for moving the nibbler 33 to the inner portion of the bead Wb (hereinafter referred to as “nibler”). 33) ”is not formed.
  • the entry path of the nibler 33 in the workpiece W is formed by the end mill 1034 of the cutting apparatus 1003. Specifically, as shown in FIG. 17, cutting is performed by the end mill 1034 from the periphery of the workpiece W to a portion inside the bead Wb. At this time, cutting is performed so that the cutting portion of the workpiece W is large enough to allow the nibbler 33 to enter. Thereby, the nibler 33 is caused to enter the cutting portion of the workpiece W, and the cutting of the workpiece W by the nibbler 33 is started from the portion inside the workpiece W from the bead Wb, thereby cutting off an unnecessary portion in the peripheral portion of the workpiece W. be able to. Note that at least one entry path for the nibbler 33 in the workpiece W may be formed, and the number thereof is not limited.
  • the end mill 1034 is attached to the other robot 32 in the cutting apparatus 1003.
  • the end mill 1034 is cut from the periphery of the workpiece W to the inner portion of the bead Wb to form an entry path for the nibler 33.
  • a processing tool such as a laser cutter can be attached to the other robot 32 instead of the end mill 1034.
  • route of the nibler 33 is formed by cutting from the periphery of the workpiece
  • the nibler 33 is set inside the bead Wb in the workpiece
  • a processing tool such as a roller is attached to the other robot 32 in the cutting apparatus 1003 in place of the end mill 1034, and at least a part of the bead Wb is moved by using the processing tool, and the nibler 33 moves beyond the bead Wb.
  • the entry path of the nibler 33 may be formed by pressing it so as to be as high as possible (height smaller than the shortest distance between the case 331 and the die 334 in the nibler 33).
  • a slit processed portion Ws serving as an entry path for the nibler 33 may be formed by providing a slit penetrating the surface of the workpiece W in a portion inside the bead Wb in the workpiece W. Is possible.
  • the slit processed portion Ws is formed by providing a substantially U-shaped slit in the work W inside the bead Wb in the work W. That is, only a part of the slit processing portion Ws is not separated from the workpiece W.
  • the slit processing part Ws when the slit processing part Ws is pressed from above by the nibler 33, the slit processing part Ws bends downward and a through hole into which the nibler 33 can be inserted is formed in the work W. It becomes. Thereby, the unnecessary part in the peripheral part of the workpiece
  • at least one slit processed portion Ws may be formed, and the number thereof is not limited.
  • the slit process part Ws was formed by providing the substantially W-shaped slit in the workpiece
  • the formation method of the slit process part Ws is not limited, It is preferable to form in drawing process S1002.
  • the upper die 1022 or the lower die 1023 may be provided with a blade for forming a substantially U-shaped slit in the workpiece W, and the slit machining portion Ws may be formed simultaneously with the drawing of the workpiece W.
  • the present invention can be used for a steel plate processing method and a steel plate processing apparatus for processing a steel plate into a predetermined shape.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
PCT/JP2012/081177 2012-11-30 2012-11-30 鋼板加工方法、および鋼板加工装置 WO2014083701A1 (ja)

Priority Applications (5)

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PCT/JP2012/081177 WO2014083701A1 (ja) 2012-11-30 2012-11-30 鋼板加工方法、および鋼板加工装置
EP12889356.7A EP2929952B1 (en) 2012-11-30 2012-11-30 Steel sheet processing method and steel sheet processing device
US14/646,862 US9687900B2 (en) 2012-11-30 2012-11-30 Method for working steel sheet, and apparatus for working steel sheet
CN201280077414.3A CN104884183B (zh) 2012-11-30 2012-11-30 钢板加工方法
JP2014549745A JP5920485B2 (ja) 2012-11-30 2012-11-30 鋼板加工方法、および鋼板加工装置

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CN113500141B (zh) * 2021-07-16 2023-06-23 深圳市鹏福创新科技有限公司 一种高透光轻薄盖板及其生产工艺
KR102498904B1 (ko) * 2021-07-30 2023-02-13 주식회사 은혜기업 자동차 대시 판넬을 제조하기 위한 드로잉 성형용 금형 장치 및 드로잉 성형 방법

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EP2929952B1 (en) 2020-04-01
CN104884183A (zh) 2015-09-02
EP2929952A4 (en) 2016-08-24
JP5920485B2 (ja) 2016-05-18
CN104884183B (zh) 2017-07-04
EP2929952A1 (en) 2015-10-14
JPWO2014083701A1 (ja) 2017-01-05
US9687900B2 (en) 2017-06-27
US20150273559A1 (en) 2015-10-01

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